A 17 metre tall tree casts a shadow that is 20 metres long. What angle, to the nearest degree, does the sun make with the ground

About 32º

Step-by-step explanation:

since 17 m is one leg, and 20m is the hypotenuse, we can write:

cos (x) = 17/20

x = cos-1(17/20)

x is about 32º

hello from mrbilldoesmath!

answer:

(7 x + 6 y) (49 x^2 - 42 x y + 36 y^2)

discussion:

the trick is to recognize that 343 = 7^3 and 216 = 6^3 and, in general,

a^3 + b^3 =   (a + b) (a^2 - a b + b^2).

in our case

343x^3+216y^3   =   (7x)^3 + (6y)^3

so take a = 7x and b = 6y in the above equation to get the answer.

you,

mrb

step-by-step explanation:

f(gx)=f(1/x+2)

=(1/x+2)+2

=(1+2x)/2+2

=(1+2x+4)/2

= (2x+5)/2